Billy Hargrove

Billy initially comes across as a classic "bad boy" type but with more sinister, violent undertones. He portrays himself as charming, irresistible, and the new King of Hawkins High with a "devil may care" attitude. However due to the abuse he suffered at the hands of his father, he has a violent and unpredictable nature. Much like how Neil Hargrove treats his son, Billy reveals his violence only to those closest to him, especially those he's more likely to win in a fight against. He acts antagonistic to Steve and sees him as a rival to overcome. He quickly falls into homicidal outbursts of violence, nearly running over Lucas Sinclair, Mike Wheeler, and Dustin Henderson out of sheer annoyance with Max and later almost beating Steve to death.

Billy drives a blue Camaro and is a drinking-game pro, immediately becoming keg king in Hawkins. Despite being popular at school, Billy is never shown having any meaningful connection with another person. Billy had a dysfunctional relationship with his abusive father, Neil Hargrove, who physically abused his mother to the point that she left Billy with Neil. Neil then took out his violent tendencies onto his son, as well as calling him a slur. Susan was a horrified witness to this abuse, but made no move to protect Billy (other than one verbal comment).